/**
 *  Unit testing file for ElevateSession command
 */
'use strict';
/* eslint max-nested-callbacks: ["error", 7] import/max-dependencies: ["error", {"max": 13}] */
// eslint-disable-next-line no-unused-vars
const testGlobals = require('../../tools/test/testGlobals.js');
const _ = require('lodash');
const Q = require('q');
const chai = require('chai');
const sinon = require('sinon');
const sinonChai = require('sinon-chai');
const chaiAsPromised = require('chai-as-promised');
const rewire = require('rewire');
const JsonRefs = require('json-refs');
const mongodb = require('mongodb');

const {MockRequest} = require('../../utils/test/mock-request');
const {bridgeBodyParser} = require('../api_body_middleware.js');

const utils = require('../../ComServe/utils');

/**
 * Use rewire to pull in the unit under test, and then get access to the
 * private variables to stub them
 */
const apiSecurityDevice = rewire('../api_security_device.js');

const authStub = apiSecurityDevice.__get__('auth');
const flagsStub = apiSecurityDevice.__get__('featureFlags');
const referencesStub = apiSecurityDevice.__get__('references');
const mainDBPStub = apiSecurityDevice.__get__('mainDBP');

/**
 * Set up chai & sinon to simplify the tests
 */
const expect = chai.expect;
const sandbox = sinon.createSandbox();

chai.use(sinonChai);
chai.use(chaiAsPromised);

/**
 * Make a promise-style version of the security handler for easier testing
 */
const deviceSessionP = (req, def, scopes) => Q.nfcall(
    apiSecurityDevice.deviceSession,
    req,
    def,
    scopes
);
const hmacNoSessionP = (req, def, scopes) => Q.nfcall(
    apiSecurityDevice.deviceHmacNoSession,
    req,
    def,
    scopes
);

const COLLECTION_DEVICES = 'Mock devices collection parameter';

/**
 * Valid values
 */
const DEVICE_TOKEN = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnop';
const SESSION_TOKEN = 'qrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUV';
const DEVICE_MONGO_ID = (new mongodb.ObjectID()).toHexString();  // New random ObjectID
const CLIENT_NAME = 'a@example.com';
const CLIENT_MONGO_ID = (new mongodb.ObjectID()).toHexString();  // New random ObjectID
const CLIENT_ID = 'A unique random value generated by us';
const CLIENT_DISPLAY_NAME = 'Display Name';

const SESSION_HEADER = DEVICE_TOKEN + ':' + SESSION_TOKEN;
const HMAC_HEADER = '0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef';
const TIMESTAMP_HEADER = new Date().toISOString();

const PROTOCOL = 'https';
const PATH = '/api/v0/devices';
const EXPECTED_FULL_URL = 'https://unittest.example.com' + PATH;
const METHOD = 'get';

const SESSION_ID = 'A session id as-if generated by express-session middleware';

const DB_FEATURE_FLAGS = ['unit-test'];
const DB_DEVICE = {
    ClientID: CLIENT_ID,
    DeviceToken: DEVICE_TOKEN,
    DeviceStatus: utils.DeviceFullyRegistered
};
const DB_CLIENT = {
    _id: CLIENT_MONGO_ID,
    ClientName: CLIENT_NAME,
    ClientID: CLIENT_ID,
    DisplayName: CLIENT_DISPLAY_NAME,
    FeatureFlags: DB_FEATURE_FLAGS,
    ClientStatus: utils.ClientEmailVerifiedMask
};

const MOCK_SWAGGER_PATHNAME = '/test-api-security-device';
const MOCK_SWAGGER_FEATURE_FLAG = 'unit-test';
const MOCK_SWAGGER_DEFINITION = {
    post: {
        summary: 'Just a test',
        description: 'Just a test',
        'x-feature-flag': MOCK_SWAGGER_FEATURE_FLAG,
        responses: {
            200: {
                description: 'Success'
            }
        }
    }
};

/**
 * Mock request for requests that use the standard security model
 */
const MOCK_REQUEST_OPTIONS = {
    headers: {
        'x-bridge-device-session': SESSION_HEADER,
        'x-bridge-hmac': HMAC_HEADER,
        'x-bridge-timestamp': TIMESTAMP_HEADER
    },
    originalUrl: PATH,
    protocol: PROTOCOL,
    method: METHOD,
    sessionID: SESSION_ID,
    session: {}     // Empty session as-if created by express-session
};

const MOCK_REQUEST_BODY = '{\n' +
    '    "test": "value",\n' +
    '    "other": "value2"\n' +
    '}';
const MOCK_REQUEST_BODY_OPTIONS = {
    mockBody: MOCK_REQUEST_BODY
};

/**
 * Mock request for requests that use the "no session" security model
 */
const SWAGGER_PATH_LOGIN = '/devices/{objectId}/login';
const PATH_LOGIN = '/api/v0/devices/' + DEVICE_MONGO_ID + '/login';
const EXPECTED_FULL_URL_LOGIN = 'https://unittest.example.com' + PATH_LOGIN;
const METHOD_LOGIN = 'POST';

const MOCK_LOGIN_REQUEST_OPTIONS = {
    headers: {
        'x-bridge-hmac': HMAC_HEADER,
        'x-bridge-timestamp': TIMESTAMP_HEADER
    },
    originalUrl: PATH_LOGIN,
    protocol: PROTOCOL,
    method: METHOD_LOGIN,
    sessionID: SESSION_ID,
    session: {}     // Empty session as-if created by express-session
};

const MOCK_LOGIN_REQUEST_BODY = '{\n' +
    '    "ClientName": "' + CLIENT_NAME + '"\n' +
    '}';

const MOCK_LOGIN_REQUEST_BODY_OPTIONS = {
    mockBody: MOCK_LOGIN_REQUEST_BODY
};

/**
 * Function to create a mock `req` objects that mimics the important parts of a
 * real request object.
 *
 * @param {Object} resolvedSwagger  - The **resolved** swagger object (i.e. all refs resolved)
 * @param {Object} reqOptions       - The additional fields to add to the request object
 * @param {Object} bodyOptions      - Additional params for creating the MockRequest (provides the body)
 */
function createMockReq(resolvedSwagger, reqOptions, bodyOptions) {
    const req = new MockRequest(_.cloneDeep(bodyOptions));
    _.merge(req, _.cloneDeep(reqOptions));
    return req;
}

/**
 * The tests
 */
describe('Device security validation', () => {
    let resolvedSwagger;
    let req;
    const def = {};

    /**
     * Before we run any tests we need to resolve all the references within
     * the swagger specification.
     */
    before(() => {
        /**
         * Set some values for the collections so we can differentiate them
         */
        mainDBPStub.mainDB._collectionDevice = mainDBPStub.mainDB.collectionDevice;
        mainDBPStub.mainDB.collectionDevice = COLLECTION_DEVICES;

        /**
         * Load the swagger files and merge them back into a single file
         */
        return JsonRefs
            .resolveRefsAt(require.resolve('../api_swagger_def.json'))
            .then((swagger) => {
                /**
                 * Add our test path to the swagger
                 */
                resolvedSwagger = swagger.resolved;
                resolvedSwagger.paths[MOCK_SWAGGER_PATHNAME] = MOCK_SWAGGER_DEFINITION;

                //
                // Add them to the default options
                //
                _.assign(MOCK_REQUEST_OPTIONS, {
                    swagger: {
                        swaggerObject: resolvedSwagger,
                        operation: resolvedSwagger.paths[MOCK_SWAGGER_PATHNAME].post
                    }
                });

                return resolvedSwagger;
            });
    });

    after(() => {
        /**
         * Set the collections back
         */
        mainDBPStub.mainDB.collectionDevice = mainDBPStub.mainDB._collectionDevice;
        delete mainDBPStub.mainDB._collectionDevice;
    });

    describe('device_session security', () => {
        /**
         * Before each test, stub the auth functions we will be calling.
         */
        beforeEach((done) => {
            req = createMockReq(resolvedSwagger, MOCK_REQUEST_OPTIONS, MOCK_REQUEST_BODY_OPTIONS);

            sandbox.stub(authStub, 'validateCurrentSession').resolves([DB_DEVICE, DB_CLIENT]);
            sandbox.stub(authStub, 'checkHMAC').resolves();
            sandbox.spy(flagsStub, 'isEnabled');

            //
            // Run the mock request through the middleware to get the parsed and raw bodies
            //
            bridgeBodyParser()(req, {}, done);
        });

        /**
         * After each test we reset the sanbox to reset all stubs etc.
         */
        afterEach(() => {
            sandbox.restore();
        });

        describe('With validly formatted params that are correct', () => {
            it('checks the device and session tokens', () => {
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(authStub.validateCurrentSession)
                        .to.have.been.calledOnce
                        .calledWith(
                            DEVICE_TOKEN,
                            SESSION_TOKEN
                        );
                });
            });

            it('checks the HMAC', () => {
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(authStub.checkHMAC)
                        .to.have.been.calledOnce
                        .calledWith(
                            DB_DEVICE,
                            {
                                address: EXPECTED_FULL_URL,
                                method: METHOD,
                                body: MOCK_REQUEST_BODY + DEVICE_TOKEN + ':' + SESSION_TOKEN,
                                ClientName: CLIENT_NAME,
                                timestamp: TIMESTAMP_HEADER,
                                hmac: HMAC_HEADER
                            }
                        );
                });
            });

            it('checks the FeatureFlags if they are required for the request', () => {
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(flagsStub.isEnabled)
                        .to.have.been.calledOnce
                        .calledWith(
                            MOCK_SWAGGER_FEATURE_FLAG,
                            DB_CLIENT
                        );
                });
            });

            it('doesn\'t check the FeatureFlags if they are NOT required for the request', () => {
                delete req.swagger.operation['x-feature-flag'];
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(flagsStub.isEnabled)
                        .to.not.have.been.called;
                });
            });

            it('stores web session data + the client (as clientObj) and device (as deviceObj) in req.session.data for controller to use', () => {
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(req.session.data)
                        .to.deep.equal({
                            //
                            // Existing session details for old web console requests
                            //
                            client: CLIENT_MONGO_ID,
                            clientID: CLIENT_ID,
                            displayName: CLIENT_DISPLAY_NAME,
                            email: CLIENT_NAME,
                            isMerchant: false,
                            isVATRegistered: false,
                            FeatureFlags: DB_FEATURE_FLAGS,

                            //
                            // New sessiond details for App APIs copied across
                            //
                            clientObj: DB_CLIENT,
                            deviceObj: DB_DEVICE,
                            isDeviceSession: true
                        });
                });
            });

            it('clears req.sessionID so express-session doesn\'t persist the session', () => {
                return deviceSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(req.sessionID)
                        .to.be.null;
                });
            });

            it('passes the security tests', () => {
                return expect(deviceSessionP(req, def, SESSION_HEADER))
                    .to.eventually.be.fulfilled;
            });
        });

        describe('With validly formatted params that are wrong', () => {
            it('rejects when required feature flag isn\'t enabled', () => {
                const NO_FEATURE_FLAG_CLIENT = {
                    ClientName: CLIENT_NAME
                };
                authStub.validateCurrentSession.resolves([DB_DEVICE, NO_FEATURE_FLAG_CLIENT]);

                return expect(deviceSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when validating current session fails', () => {
                authStub.validateCurrentSession.rejects();
                return expect(deviceSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when checking HMAC fails', () => {
                authStub.checkHMAC.rejects();
                return expect(deviceSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('leaves req.sessionID alone when device session verifcation fails', () => {
                authStub.checkHMAC.rejects();
                return deviceSessionP(req, def, SESSION_HEADER).catch(() => {
                    return expect(req.sessionID)
                        .to.equal(SESSION_ID);
                });
            });
        });

        describe('With invalidly formatted params', () => {
            describe('Rejects when x-bridge-session-device is the wrong format: ', () => {
                it('missing entirely', () => {
                    return expect(deviceSessionP(req, def, undefined)).to
                        .eventually.be.rejected;
                });

                it('device token too short', () => {
                    const token = DEVICE_TOKEN.slice(0, -1) + ':' + SESSION_TOKEN;
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('device token too long', () => {
                    const token = DEVICE_TOKEN + 'a:' + SESSION_TOKEN;
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('device token invalid char', () => {
                    const token = DEVICE_TOKEN.slice(0, -1) + '!:' + SESSION_TOKEN;
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('session token too short', () => {
                    const token = DEVICE_TOKEN + ':' + SESSION_TOKEN.slice(0, -1);
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('session token too long', () => {
                    const token = DEVICE_TOKEN + ':b' + SESSION_TOKEN;
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('session token invalid char', () => {
                    const token = DEVICE_TOKEN + ':?' + SESSION_TOKEN.slice(0, -1);
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });

                it('wrong character between tokens', () => {
                    const token = DEVICE_TOKEN + ';' + SESSION_TOKEN;
                    return expect(deviceSessionP(req, def, token)).to
                        .eventually.be.rejected;
                });
            });

            describe('Rejects when x-bridge-hmac is the wrong format: ', () => {
                it('missing entirely', () => {
                    delete req.headers['x-bridge-hmac'];
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too short', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER.slice(0, -1);
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too long', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER + 'a';
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('invalid char', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER.slice(0, -1) + '!';
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });

            describe('Rejects when x-bridge-timestamp is the wrong format: ', () => {
                it('missing entirely', () => {
                    delete req.headers['x-bridge-timestamp'];
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('not a string', () => {
                    req.headers['x-bridge-timestamp'] = Date.now();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('only has date', () => {
                    req.headers['x-bridge-timestamp'] = new Date().toDateString();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('only has time', () => {
                    req.headers['x-bridge-timestamp'] = new Date().toTimeString();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });
        });
    });

    describe('device_hmac_nosession security', () => {
        /**
         * Before each test, stub the auth functions we will be calling.
         */
        beforeEach((done) => {
            //
            // Setup the swagger details as-if parsed from the request by the
            // swagger middleware
            //
            _.assign(MOCK_LOGIN_REQUEST_OPTIONS, {
                swagger: {
                    swaggerObject: resolvedSwagger,
                    operation: resolvedSwagger.paths[SWAGGER_PATH_LOGIN].post,
                    params: {
                        objectId: {
                            value: DEVICE_MONGO_ID
                        },
                        body: {
                            value: {
                                ClientName: CLIENT_NAME
                            }
                        }
                    }
                }
            });

            req = createMockReq(
                resolvedSwagger,
                MOCK_LOGIN_REQUEST_OPTIONS,
                MOCK_LOGIN_REQUEST_BODY_OPTIONS
            );

            sandbox.stub(authStub, 'checkHMAC').resolves();
            sandbox.stub(referencesStub, 'getClientByEmail').resolves(DB_CLIENT);
            sandbox.stub(mainDBPStub, 'findOneObject').resolves(DB_DEVICE);

            sandbox.spy(flagsStub, 'isEnabled');
            sandbox.spy(authStub, 'checkClientStatus');
            sandbox.spy(authStub, 'checkDeviceStatus');

            //
            // Run the mock request through the middleware to get the parsed and raw bodies
            //
            bridgeBodyParser()(req, {}, done);
        });

        /**
         * After each test we reset the sanbox to reset all stubs etc.
         */
        afterEach(() => {
            sandbox.restore();
        });

        describe('With validly formatted params that are correct', () => {
            it('gets the client based on the ClientName in the body', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(referencesStub.getClientByEmail)
                        .to.have.been.calledOnce
                        .calledWith(CLIENT_NAME);
                });
            });

            it('gets the device based on the objectID if it is owned by the correct client', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(mainDBPStub.findOneObject)
                        .to.have.been.calledOnce
                        .calledWith(
                            mainDBPStub.mainDB.collectionDevice,
                            {
                                _id: mongodb.ObjectID(DEVICE_MONGO_ID),
                                ClientID: CLIENT_ID
                            }
                        );
                });
            });

            it('checks the client is in a valid state', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(authStub.checkClientStatus)
                        .to.have.been.calledOnce
                        .calledWith(utils.ClientEmailVerifiedMask)
                        .returned(null);  // Null for no errors
                });
            });

            it('checks the device is in a valid state', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(authStub.checkDeviceStatus)
                        .to.have.been.calledOnce
                        .calledWith(utils.DeviceFullyRegistered)
                        .returned(null);  // Null for no errors
                });
            });

            it('checks the HMAC, with the function name set to Login1.process', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(authStub.checkHMAC)
                        .to.have.been.calledOnce
                        .calledWith(
                            DB_DEVICE,
                            {
                                address: EXPECTED_FULL_URL_LOGIN,
                                method: METHOD_LOGIN,
                                body: MOCK_LOGIN_REQUEST_BODY,
                                ClientName: CLIENT_NAME,
                                timestamp: TIMESTAMP_HEADER,
                                hmac: HMAC_HEADER
                            },
                            'Login1.process'  // Renamed to Login1.process to match expectations
                        );
                });
            });

            it('checks the FeatureFlags if they are required for the request', () => {
                req.swagger.operation['x-feature-flag'] = MOCK_SWAGGER_FEATURE_FLAG;
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(flagsStub.isEnabled)
                        .to.have.been.calledOnce
                        .calledWith(
                            MOCK_SWAGGER_FEATURE_FLAG,
                            DB_CLIENT
                        );
                });
            });

            it('doesn\'t check the FeatureFlags if they are NOT required for the request', () => {
                delete req.swagger.operation['x-feature-flag'];
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(flagsStub.isEnabled)
                        .to.not.have.been.called;
                });
            });

            it('stores web session data + the client (as clientObj) and device (as deviceObj) in req.session.data for controller to use', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(req.session.data)
                        .to.deep.equal({
                            //
                            // Existing session details for old web console requests
                            //
                            client: CLIENT_MONGO_ID,
                            clientID: CLIENT_ID,
                            displayName: CLIENT_DISPLAY_NAME,
                            email: CLIENT_NAME,
                            isMerchant: false,
                            isVATRegistered: false,
                            FeatureFlags: DB_FEATURE_FLAGS,

                            //
                            // New sessiond details for App APIs copied across
                            //
                            clientObj: DB_CLIENT,
                            deviceObj: DB_DEVICE,
                            isDeviceSession: true
                        });
                });
            });

            it('clears req.sessionID so express-session doesn\'t persist the session', () => {
                return hmacNoSessionP(req, def, SESSION_HEADER).then(() => {
                    return expect(req.sessionID)
                        .to.be.null;
                });
            });

            it('passes the security tests', () => {
                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .to.eventually.be.fulfilled;
            });
        });

        describe('With validly formatted params that are wrong', () => {
            it('rejects when required feature flag isn\'t enabled', () => {
                // Fake that a feature flag is required
                req.swagger.operation['x-feature-flag'] = MOCK_SWAGGER_FEATURE_FLAG;

                // Return a client that doesn't have that flag
                const modifiedClient = _.cloneDeep(DB_CLIENT);
                modifiedClient.FeatureFlags = [];
                referencesStub.getClientByEmail.resolves(modifiedClient);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when finding the client fails', () => {
                referencesStub.getClientByEmail.rejects();
                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when finding the device fails', () => {
                mainDBPStub.findOneObject.rejects();
                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when the client isn\'t verified', () => {
                const modifiedClient = _.cloneDeep(DB_CLIENT);
                modifiedClient.ClientStatus = 0;
                referencesStub.getClientByEmail.resolves(modifiedClient);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when the client is barred', () => {
                const modifiedClient = _.cloneDeep(DB_CLIENT);
                modifiedClient.ClientStatus |= utils.ClientBarredMask;
                referencesStub.getClientByEmail.resolves(modifiedClient);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when the device isn\'t completely registered', () => {
                const modifiedDevice = _.cloneDeep(DB_DEVICE);
                modifiedDevice.DeviceStatus = utils.DeviceRegister2Mask;
                mainDBPStub.findOneObject.resolves(modifiedDevice);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when the device is suspended', () => {
                const modifiedDevice = _.cloneDeep(DB_DEVICE);
                modifiedDevice.DeviceStatus |= utils.DeviceSuspendedMask;
                mainDBPStub.findOneObject.resolves(modifiedDevice);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when the device is barred', () => {
                const modifiedDevice = _.cloneDeep(DB_DEVICE);
                modifiedDevice.DeviceStatus |= utils.DeviceBarredMask;
                mainDBPStub.findOneObject.resolves(modifiedDevice);

                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('rejects when checking HMAC fails', () => {
                authStub.checkHMAC.rejects();
                return expect(hmacNoSessionP(req, def, SESSION_HEADER))
                    .eventually.be.rejected;
            });

            it('leaves req.sessionID alone when device session verifcation fails', () => {
                authStub.checkHMAC.rejects();
                return hmacNoSessionP(req, def, SESSION_HEADER).catch(() => {
                    return expect(req.sessionID)
                        .to.equal(SESSION_ID);
                });
            });
        });

        describe('With invalidly formatted params', () => {
            describe('Rejects when x-bridge-hmac is the wrong format: ', () => {
                it('missing entirely', () => {
                    delete req.headers['x-bridge-hmac'];
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too short', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER.slice(0, -1);
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too long', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER + 'a';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('invalid char', () => {
                    req.headers['x-bridge-hmac'] = HMAC_HEADER.slice(0, -1) + '!';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });

            describe('Rejects when x-bridge-timestamp is the wrong format: ', () => {
                it('missing entirely', () => {
                    delete req.headers['x-bridge-timestamp'];
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('not a string', () => {
                    req.headers['x-bridge-timestamp'] = Date.now();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('only has date', () => {
                    req.headers['x-bridge-timestamp'] = new Date().toDateString();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('only has time', () => {
                    req.headers['x-bridge-timestamp'] = new Date().toTimeString();
                    return expect(deviceSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });

            describe('Rejects when objectId is the wrong format: ', () => {
                it('too short', () => {
                    req.swagger.params.objectId.value = DEVICE_MONGO_ID.slice(0, -1);
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too long', () => {
                    req.swagger.params.objectId.value = DEVICE_MONGO_ID + 'a';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('invalid char', () => {
                    req.swagger.params.objectId.value = DEVICE_MONGO_ID.slice(0, -1) + 'g';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });

            describe('Rejects when ClientName is the wrong format: ', () => {
                it('too short', () => {
                    req.swagger.params.body.value.ClientName = 'a@b.co';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('too long', () => {
                    req.swagger.params.body.value.ClientName =
                        'a@' +
                        'b'.repeat(249) +
                        '.com';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('invalid char', () => {
                    req.swagger.params.body.value.ClientName = 'a@Bücher.example'; // No IDN support
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('missing the @', () => {
                    req.swagger.params.body.value.ClientName = 'example.com';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });

                it('missing the tld', () => {
                    req.swagger.params.body.value.ClientName = 'aexample';
                    return expect(hmacNoSessionP(req, def, SESSION_HEADER)).to
                        .eventually.be.rejected;
                });
            });
        });
    });
});